Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a landscape display screen or portion thereof with an animated graphical user interface showing a first image in the sequence showing our new design;

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a fourth image thereof;

FIG. 5 is a fifth image thereof;

FIG. 6 is a sixth image thereof;

FIG. 7 is a seventh image thereof;

FIG. 8 is an eighth image thereof;

FIG. 9 is a ninth image thereof;

FIG. 10 is a tenth image thereof;

FIG. 11 is a eleventh image thereof;

FIG. 12 is a twelfth image thereof;

FIG. 13 is a thirteenth image thereof;

FIG. 14 is a fourteenth image thereof;

FIG. 15 is a fifteenth image thereof;

FIG. 16 is a sixteenth image thereof;

FIG. 17 is a seventeenth image thereof;

FIG. 18 is an eighteenth image thereof; and,

FIG. 19 is a nineteenth image thereof.

The broken lines in the Figures show of a features of the display screen or portion thereof with an animated graphical user interface which form no part of the claimed design.

The appearance of the animated images sequentially transitions between the images shown in FIGS. 1-19. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 